How to upload multiple images into mongoDB? - mongodb

Question

I successfully coded to upload a image upload into the MongoDB. But now i want to upload multiple images into database. i used gridFS and multer. Can someone help me out to solve this problem
// Create Storage engine
var storage = new GridFsStorage({
url: Mongo,
file: (req, file) => {
return new Promise((resolve, reject) => {
crypto.randomBytes(16, (err, buf) => {
if (err) {
return reject(err);
}
const filename = buf.toString('hex') + path.extname(file.originalname);
const fileInfo = {
filename: filename,
bucketName: 'uploads',
metadata: {'username': req.body.username}
};
resolve(fileInfo);
});
});
}
});
const upload = multer({ storage });
/*--------------------------------------------------------*/
app.get('/',(req,res)=>{
gfs.files.find().toArray((err,files)=>{
// Check if Files
if(!files || files.length ===0)
{
res.render('index',{files:false});
} else{
files.map(file=>{
if(file.contentType === 'image/jpeg' || file.contentType ===
'image/png')
{
file.isImage = true;
} else {
file.isImage = false;
}
});
res.render('index',{files:files});
}
});
});
/*----------------------------------------------------*/
// Display Image
app.get('/image/:filename', (req,res)=>{
gfs.files.findOne({filename: req.params.filename}, (req,file) =>{
// Check if File
if(!file || file.length ===0)
{
return res.status(404).json({
err: 'No files exist'
});
}
// Check if image
if(file.contentType === 'image/jpeg' || file.contentType === 'image/png')
{
// Read output tp browser
var readstream = gfs.createReadStream(file.filename);
readstream.pipe(res);
}
else
{
res.status(404).json({
err: 'Not an image'
});
}
});
});
i attached code section which is related to image upload. please check this code and give a good trick to upload multiple images to mongoDB